The story of a first-year junior high school student Honda Non. One day, the three princesses of “Kokona Kingdom”, Allen, Ciel, and Kira were transferred to his school… !! The three princesses were very popular at the school! But Non-kun accidentally touches Ciel and Kira's chest. In their country, there is a rule that says that, “If a man touches the chest of a woman, she has to marry him” ... Suddenly Non-kun is bethrothed to become a handsome prince?